Several common medications can raise uric acid levels in your blood and either trigger gout for the first time or worsen existing gout. Diuretics (water pills) are the most frequent culprits, but blood pressure medications, low-dose aspirin, tuberculosis drugs, immunosuppressants, and high-dose niacin can all contribute. Understanding which drugs carry this risk puts you in a better position to have a conversation about alternatives.
Diuretics: The Most Common Trigger
Diuretics are the medication class most strongly linked to gout. A large population-based study found that current diuretic use more than doubled the risk of developing gout, with a relative risk of 2.36 compared to people with hypertension who weren’t taking them. Both thiazide diuretics (like hydrochlorothiazide) and loop diuretics (like furosemide) increase uric acid levels by forcing your kidneys to reabsorb more uric acid back into the bloodstream instead of flushing it out. The effect is dose-dependent, meaning higher doses cause greater uric acid retention.
Because diuretics are so commonly prescribed for high blood pressure and heart failure, they’re one of the most frequent causes of drug-induced gout. The 2020 American College of Rheumatology guidelines specifically recommend switching hydrochlorothiazide to a different blood pressure medication when feasible for people who have gout.
Other Blood Pressure Medications
Diuretics aren’t the only blood pressure drugs that raise gout risk. Beta blockers increase the risk by about 48%, ACE inhibitors by about 24%, and most angiotensin II receptor blockers by about 29%. These are substantial increases for medications that millions of people take daily.
Two classes of blood pressure drugs actually lower gout risk. Calcium channel blockers reduced the risk of developing gout by 13%, and the benefit grew with longer use, reaching a 25% reduction after two or more years. Losartan, one specific angiotensin II receptor blocker, reduced gout risk by 19%, improving to 29% with extended use. Losartan has unique uric acid-lowering properties that other drugs in its class don’t share. The ACR guidelines recommend choosing losartan preferentially when a blood pressure medication is needed for someone with gout.
Low-Dose Aspirin
Daily low-dose aspirin (75 to 100 mg), the kind taken for heart protection, can reduce your kidneys’ ability to excrete uric acid. One study in elderly patients found that 75 mg per day caused a 15% drop in uric acid excretion within the first week. At higher doses (above 300 mg), aspirin actually has the opposite effect and helps the body clear uric acid, but nobody takes those doses daily for heart health.
Despite this effect, the ACR guidelines specifically recommend against stopping low-dose aspirin to manage gout if you’re taking it for a legitimate reason like heart disease prevention. The cardiovascular benefits outweigh the modest impact on uric acid, and there are better ways to control gout than dropping a medication that protects your heart.
Tuberculosis Drugs
Pyrazinamide is one of the most potent uric acid-raising medications in clinical use. At a standard therapeutic dose, it slashes the kidneys’ ability to clear uric acid by more than 80%. Between 43% and 100% of patients treated with pyrazinamide develop elevated uric acid levels, and some experience full-blown gout attacks during treatment. The drug’s breakdown product interferes directly with the same enzyme pathway that gout medications target.
Ethambutol, another tuberculosis drug, also raises uric acid by reducing kidney clearance, though less dramatically and less consistently than pyrazinamide. Since both drugs are often used together in standard TB treatment regimens, the combined effect can be significant.
Immunosuppressants After Organ Transplant
Cyclosporine is considered the single biggest risk factor for gout in organ transplant recipients. A study of kidney transplant patients found a 7.6% cumulative incidence of new-onset gout within three years of transplant, and cyclosporine use was independently associated with higher risk compared to tacrolimus. The drug impairs the kidneys’ ability to excrete uric acid, and because transplant patients often take diuretics as well, the effects can compound.
Tacrolimus, a related immunosuppressant, can also raise uric acid levels, though it appears to carry a lower gout risk than cyclosporine. For transplant patients who develop gout, managing the condition is complicated because many standard gout treatments interact with immunosuppressant drugs.
Niacin (Vitamin B3)
Niacin at pharmacologic doses (1,000 to 3,000 mg per day), the kind sometimes prescribed for cholesterol management, can raise uric acid levels by roughly 14% by reducing urinary excretion. This is far above the small amounts of niacin you’d get from food or a standard multivitamin. The American College of Cardiology and American Heart Association recommend monitoring uric acid levels in anyone taking high-dose niacin and stopping the supplement if acute gout develops.
Cancer Chemotherapy
Cytotoxic chemotherapy drugs cause the most dangerous form of drug-induced high uric acid. When cancer cells are destroyed rapidly, they release massive amounts of purines that the body converts to uric acid. This process, called tumor lysis syndrome, can overwhelm the kidneys and cause uric acid levels to spike dangerously. It occurs most commonly with chemotherapy for blood cancers like leukemia and lymphoma, but can also happen with newer targeted therapies. Oncology teams routinely monitor for this and often give preventive treatment before chemotherapy begins.
Fructose and Sugar Alcohols
Though not prescription medications, several commonly consumed substances raise uric acid through the same mechanisms as drugs. Fructose is strongly linked to higher uric acid and increased gout risk in both men and women. When your liver metabolizes fructose, it burns through a molecule called ATP, generating purines as a byproduct that ultimately become uric acid. Sorbitol, a sugar alcohol found in sugar-free products, converts to fructose in the liver and has the same effect. Xylitol, another sugar alcohol, raises uric acid through a slightly different pathway by directly enhancing purine breakdown.
What You Can Do About It
If you have gout or a history of high uric acid, it’s worth reviewing your medication list with the specific risks above in mind. Some swaps are straightforward. Replacing hydrochlorothiazide with a calcium channel blocker or losartan, for instance, can address blood pressure while actually lowering gout risk. A population study found that long-term losartan use cut gout risk by 29% compared to no treatment, making it a genuinely helpful choice for people managing both conditions.
Other medications, like low-dose aspirin for heart protection, TB drugs during active treatment, or immunosuppressants after transplant, are medically necessary and shouldn’t be stopped just to manage uric acid. In those cases, the better approach is adding gout-specific treatment to bring uric acid down while continuing the essential medication. The key principle from the ACR guidelines: switching or stopping a medication should only happen when the gout benefit clearly outweighs the risk of changing the drug.